Your last enemy will be The Guardian, found at the very end of the ruins. The enemy is quite resistant, but not at all hard to defeat. Just keep him at distance, dodge his ranged attacks and jump towards him often, using your strongest skills.
With the enemy finally dead, place the amulet on him and take the Glass of Ambient.
You need to bring the artifact to Grim, who's waiting by the exit. That way you will end this mission and receive a new one, the description of which can be found in the part of the guide dedicated to Detyre.
Vulgar Donnoh at Moon Camp M5(6) will ask you to bring some old clothes which he could turn into new ones. He will reward you with gold for each item.
The tunics can be found in various places throughout Amalur. One of them is the Seafoam Tavern in Rathir M6(2). The clothes can be found inside the cabinets on the upper floor.
In the northern part of Tywili Coast, Clyeth Arne M5(9) is looking for someone who can help him in obtaining two items: a staff and talisman. Both artifacts can be found in Dolve Arne M5(10), but you need a pass to get there.
You can obtain in a couple ways:
1. Speak to Anwyr Hedef nearby the entrance and convince him to let you inside by using persuasion.
2. Steal the pass from Anwyr by sneaking to him.
3. Speak to Reen Quiller in Moon Camp M5(6) and buy the pass.
Having obtained the necessary item, speak to Anwyr Hedef beside the gate and head inside.
Dolve Arne map
1 - Talisman
2 - Staff
3 - Maybryn Wine
The talisman and staff can be found in the northern part of the fortress. They're guarded by a couple large rats and spiders, but that shouldn't be too much of a challenge for you.
Having obtained both items, take them back to their owner. You will be able to decide which to return and which to keep for yourself. Regardless of your choice you will receive the same amount of gold and a random ring.
NOTICE! If you inform Anwyr Hedef of Clyeth's whereabouts, he will be thrown into the Rathir prison M6(10). In such case you will need to take both items there. It however doesn't have any influence on the prize your receive or the dialogues.